Ptanoqraph co



I. TURNER ANDf4 E. TETZEL. 1R. PLASTIC MOLD.

APPLICATION FILED IAN. 2, 1918.

Holm/u ma I. TURNER AND E4 TETZELJB.

PLASTIC MOLD. APPLICATION FILED IAN. 2,1918..

v Patented Aug. 19,1919.

2 SHEETS-SHEET 2.

@Houd ma THE COLUMBIA PLANOORAPH co., WASHINGTON. D. c."

To all whom t may concern i f Be it known that we, IsAAo TORNER and EDMUND Tn'izEL'Jr., citizens of-the Unitedr States, residing at Terra `Haute, in the county of Vigo and State of Indiana, have -invented certain new and useful Improvel `like whereby the plastic material from which the saine areformed will bemaintained in proper shape until the same has become suiiiciently hard or set, whereuponfthe form can be then'l collapsed and removed therefrom without disturbing or injuring the product in any way.

Another and equally important object of the invention is to provide novel form supportingy means, which means are arranged to permit the adjustingof the sainein order that culverts or similar devices diifering in size can be made thereby without the necessity of employingr additional forms. Yet another important characteristic of the invention resides in the manner in which the form supporting means are arranged,

:whereby the same can be moved collectively yfor adjusting the forms.

Other objects will be in partobviousand f p recesses 13 for receiving the yvertical porin part pointed out hereinafter. y

The invention consists, furthermore, in the novel arrangements and combinations 0f the parts of the form, aswell as in the details of the construction of the same, all of which will be more fully described in the following speciiication, and then iinally embodiedl in the clauses of the claim which are appendedr to the specification and which form an essential part of the same.

The invention is clearly illustrated in the accompanying drawings, in which Figure 1 is a vertical longitudinal section through the improved form,

Fig. 2 is a vertical transverse section therethrough,

Fig. 3 is a fragmental section through one of the heads, and,

Fig. 4 is an elevation of a slightly modii'ied form of head.

Similar reference characters refer to similar parts throughout the several views of the drawings.

Having more particular reference` to the IsnAo TORNER Ani) EDMUNDTETZEI., Jn., .OFTEBRE IIAUTE, INDIANA.

y y i?LAsIic-.ivionn n n l Specicaton of Letters Patent. Patented Aug'. 19, 1919.

Application led January 2. 1918. Serial No. 209.880.

drawings,v1 represents the base of the form,

the .same being provided Awith oppositely disposedwheels 2, whereby moving of the formwill be readily permitted. Bearings 3 are -arranged upon the upper surface of the base -1'at pointsadjacent the opposite ends o f the same' and receive the opposite portions of a longitudinally disposed shaft 4 therethrough, one end ofthe said shaft having a crank handle 5 or other suitable operating Vmeans 'engaged therewith. f To prevent lateral movement of the shaft, collars 6 may be and preferably are arranged thereon and engage'with the-adjacent faces of the bearings 3. In this connectiomit is to be noted that portions of the shaft' 4 are vprovided with right and left handed threads indicated .by the numerals 7 and 8, over which afplurality of pairs of head pieces 10 are engaged,

Vthe saidV head pieces being provided with internally screw threadedbores corresponding to the 'pitch of the threads 7 and 8 with which the same are engaged. In order that the heads 10 will be'securely and slidably engaged withthe base 1,".We provide an undercutway 11 in each of the same, these ways `receiving .the laterally disposed portions of guide rails 12 therein. `It may be here noted, that the way 11 may be varied vin design, such as conditions vor preference 4may dictate, as shown in Fig. 4, wherein the head piecesare provided with plane ways or tions of guide rails 14, which guide rails are formedy of angle metal. The head pieces 10 are semi-circular inshape and have longitudinally disposed grooves 15 formedin the peripheral surfacesthereof, while bifurcated lugs 16 are formed upon the opposite' eX- .tremities thereof for a purpose which will be subsequently described. Communicatin with the grooves 15 are a plurality of rad1- ally disposed slots or pockets 17, which also will be more fully hereinafter described.

Form supporting arms 1S and 19 are' provided and as will be noted,A have their lower ends pivotally engaged with their respective pairs of head pieces 10 by means of a semicircular tie rod 20 which rod is passed through suitable ,openings formed in the said lower ends and havey the heads of the same engaged in one of the bifurcated lugs 16 while thel remaining end thereof is arranged betweenthe remaining bifurcated lug 16 on each of the head pieces '10 and securedthere-v to by locking nuts 21 'which are turned into Clinics eff-this patentA may lie-*obtained engagement with suitably screw threaded eX- tremities thereon.H Thus, it |Will be understood that the semi-circularr'od 20 Will seat in the longitudinal grooves 15 formed in the leach of these; sections'have tlieup-per ends of the-various pairs otsupporting arms 18 and 19 pivotally secured thereto yas at 23. Due -to' the fact that the form is composed o-fzaplurality; of sections, itWill befreadily understood'that relative movement of the saine will be permitted; hence, it may be collapsed When desired.

f -In operation, the sectionalforniQQ is normallyarranged in its collapsed folded position, Whereat the `variouspairs ofA arms 18 and'f1 9 are. also arranged iii their lmvermosr position and the head pieces 1O1'to Which they are connected are positioned accordingly.

.To set the foi-m up previous to the arrange- --ment ofthe plastic material thereover, it is onlyinecessary to` rotate theshatt through the'medium ofz the crank handle 5, Where- 4upon the sectional Aform 22 Will be raised to the desired: height and, or course, adj usted to the proper Width; Vlith'the form soy positioned, the plastic material may be now arranged thereover' and kpermittedto become -sufliciently hard or set.v ATo'. remove the forin from engagement with the material, the shaft l is now rotated iir a'reverse direction causing vIthe arms 18 and 19 to be folded and consequently, the sectional form .22 to collapse.l .f/Wlien in its collapsed `orY folded position .thevform' may be readily Withdrawn from.engagement with the product, due-.to athe fact thatthe base 1fis` mounted on the Wheels.` Thus, the v"completed article is ni-shedwithout the usuallaborious task of disassembling the formv piece meal and perchance, injuring the same during such operation. l

vIt is'to be alsounder'sto'od,tliat our im- .provded form may be used for molding plastic material varying in size, due to the adjust- 1 able arrangement of the sectionzform. Further, by varying the particular design or y1 -shapel ofthe sectional form, devices differing in shape may be also molded thereby. By mounting the arms18..and19-'so` asto cause the 'crossingo't the intermediate portions thereof'wh'en they arein raised position, it

'will be readily understood thattlieform;V construction isniateri-ally braced. by thepressing actionthusgiven.4 -This, renders the form especially desirable for use in: connection With the molding of .heavyfconcrete Work;

aveidiiigthefcollapsing of the structure or `the'undue giving or ply thereof.

: Manifestly,r the construction'shown'is capfable. of considerable modification and such Y :modification: as is *Within 'the' scope of `our claim, We'c'onsider Within the spirit of our invention.

' We claim AA plastic `mold including a Wheeled. base,

vguide means disposed. longitudinally thereof,

head pieces securedto and slidable on the base, *a shaft mounted in bearings longitudinally otthe'base, said? head pieces having Ways `formed in their peripheral surfaces, lateral: lugsl carried' by Said headV pieces adjacent. 'the extremities 'ot'. the Ways, oppositely' .disposed crossed armshavingcertain of their endsengaged'in saidperipheral Ways', a segmental'bolt passing'throughf the Ways secured atfitsl opposite ends-to said lugs for pivoting: the adjacent ends of the: crossed arms to the head pieces, and ani adjustable form supported on 'the' remaining 'endsE of saint-arms.

In testimoiiywhereoiwe atlix our signatures hereto.

ISAAC TORNER. 'EDMUND TETZEL, JR.

for ve `.cents `each-by adressimgfthe Commissioner- Ot Patents, Washington, D. 0. 

